In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 4.4 inches per month. January is typically the wettest month, when rainfall can reach 4.4 in. July is typically the driest time to visit San Francisco when rainfall is around 0.0 in.

If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

What is the cheapest time of day to fly from TTN to SFO?

When flying from Trenton, New Jersey to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Trenton, New Jersey-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Trenton, New Jersey-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-San Francisco flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Trenton, New Jersey-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Trenton to San Francisco?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.

Can I find deals for business class flights from Trenton to San Francisco?

Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$264+ Cheap Flights from Trenton, NJ to San Francisco

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1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Trenton to San Francisco

One-way

One-way flights from Trenton to San Francisco
Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.

Mon 9/147:39 pm -

2 stops21h 50m

Deal found 8/6

$264

Sun 11/87:19 pm -

2 stops18h 50m

Deal found 8/6

$340

Mon 11/305:25 pm -

3 stops34h 16m

Deal found 8/8

$451

Sun 9/277:19 pm -

2 stops18h 50m

Deal found 8/7

$470

Find flight deals from Trenton to San Francisco

Most accurate provider	FlightHub 3 stars
Most trusted provider	FlightHub 3 stars
Popular in	June
Cheapest in	January
Average price	$522

Provider with most accurate pricing for Trenton-Mercer-San Francisco flight deals.

Search Deals

Provider most trusted by Cheapflights users for Trenton-Mercer-San Francisco flights.

Search Deals

Highest demand for flights based on searches. 17% potential increase in price ($90 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in August 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest one-way

TrentonSan Francisco

TTN Trenton-Mercer - SFO San Francisco

TTNSFO

Trenton-Mercer

Mon 9/14

7:39 pm-2:29 pm

2 stops21h 50m

$264

Quickest one-way

TrentonSan Francisco

TTN Trenton-Mercer - SFO San Francisco

TTNSFO

Trenton-Mercer

Sun 11/8

7:19 pm-11:09 am

2 stops18h 50m

$340

TrentonSan Francisco

TTN Trenton-Mercer - SFO San Francisco

TTNSFO

Trenton-Mercer

Mon 11/30

5:25 pm-12:41 am

3 stops34h 16m

$451

TrentonSan Francisco

TTN Trenton-Mercer - SFO San Francisco

TTNSFO

Trenton-Mercer

Sun 9/27

7:19 pm-11:09 am

2 stops18h 50m

$470

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/6

Sorted by cheapest first

Compare providers for flights from Trenton to San Francisco

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to San Francisco in August.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy1 star	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

Most accurate provider: When it comes to deals on Trenton, New Jersey-San Francisco flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Trenton, New Jersey-San Francisco flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Trenton, New Jersey-San Francisco flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Trenton, New Jersey-San Francisco flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Trenton, New Jersey-San Francisco flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

TTN-SFO

Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing San Francisco

Peruse reviews from past customers who have flown with American Airlines from Trenton to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

American Airlines

7.1

Good

11,898 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

American Airlines

7.1

Good

11,898 reviews

American Airlines

7.1

Good

11,898 reviews

Reviews

1 / 20

2.0

Mediocre

Anonymous,Mar 2026

MIA - SFO

Horrible. When they power flights for other airlines there is nothing they can do to change or accommodate any changes

Related info for your journey

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?
Yes. In addition to deals on Trenton to San Francisco flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Trenton to San Francisco?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Trenton to San Francisco.
Can I find deals for business class flights from Trenton to San Francisco?
Yes. Cheapflights offers flight deals from Trenton to San Francisco by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Top airline flying from Trenton to San Francisco

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$299	Average$428	FlexibilityNo cancel fee	On-time71%

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$264+ Cheap flights from Trenton, NJ to San Francisco (TTN - SFO)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/14. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Trenton to San Francisco with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Trenton to San Francisco

One-way flights from Trenton to San FranciscoSearch for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.

Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.

Find flight deals from Trenton to San Francisco

Most accurate provider

Most trusted provider

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Trenton to San Francisco that are best for you.

Compare providers for flights from Trenton to San Francisco

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.

Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Trenton to San Francisco in August.

Best time to book a flight from Trenton to San Francisco

Have a flexible travel schedule? Discover the best time to fly to San Francisco from Trenton with our price prediction graph.

Reviews of airlines servicing San Francisco

Peruse reviews from past customers who have flown with American Airlines from Trenton to San Francisco to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Can I find deals for flights from Trenton to San Francisco that include hotel bookings?

How can I find direct flights from Trenton to San Francisco?

Can I find deals for business class flights from Trenton to San Francisco?

Traveling to a place near San Francisco?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Trenton to San Francisco

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to San Francisco by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Trenton to San Francisco by cabin class

Find flights from Trenton to San Francisco, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Trenton and San Francisco flights

Browse other Trenton and San Francisco flight options. Last updated on August 10, 2026.

Other flights from Trenton

Browse through other flights departing from Trenton. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.

Popular flight searches

Check out other popular destinations found by fellow travelers in 2026

Other flights to San Francisco

Explore flights to San Francisco departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on August 10, 2026.

Top airline flying from Trenton to San Francisco

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One-way flights from Trenton to San Francisco
Search for one-way flight options from Trenton to San Francisco. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.